Past measurement result　by Seawater Radiation Monitor near Fukushima Daiichi Nuclear Power Station

○Information

○Measurement value list ： 2026/04/17(CSV Download)

Radioactivity Concentration Unit:Bq/L

※ When being smaller then detection limit value, the numerical value is indicated with ND

TimeCs137Cs134Totalβ
00:00NDND21
00:10NDND19
00:20NDND19
00:30NDND17
00:40NDND16
00:50NDND15
01:00NDND17
01:10NDND19
01:20NDND17
01:30NDND16
01:40NDND16
01:50NDND13
02:00NDND12
02:10NDND8.8
02:20NDND11
02:30NDND12
02:40NDND14
02:50NDND14
03:00NDND12
03:10NDND18
03:20NDND18
03:30NDND18
03:40NDND17
03:50NDND19
04:00NDND19
04:10NDND18
04:20NDND17
04:30NDND16
04:40NDND16
04:50NDND16
05:00NDND15
05:10NDND14
05:20NDND15
05:30NDND15
05:40NDND15
05:50NDND12
06:00NDND13
06:10NDND14
06:20NDND14
06:30NDND16
06:40NDND16
06:50NDND16
07:00NDND17
07:10NDND16
07:20NDND12
07:30NDND10
07:40NDND11
07:50NDND12
08:00NDND12
08:10NDND13
08:20NDND13
08:30NDND14
08:40NDND13
08:50NDND14
09:00NDND14
09:10NDND12
09:20NDND16
09:30NDND14
09:40NDND13
09:50NDND13
10:00NDND14
10:10NDND16
10:20NDND13
10:30NDND14
10:40NDND17
10:50NDND14
11:00NDND16
11:10NDND18
11:20NDND17
11:30NDND18
11:40NDND17
11:50NDND17
12:00NDND13
12:10NDND11
12:20NDND14
12:30NDND15
12:40NDND14
12:50NDND16
13:00NDND18
13:10NDND21
13:20NDND20
13:30NDND20
13:40NDND20
13:50NDND18
14:00NDND15
14:10NDND14
14:20NDND15
14:30NDND15
14:40NDND15
14:50NDND15
15:00NDND16
15:10NDND16
15:20NDND13
15:30NDND12
15:40NDND13
15:50NDND16
16:00NDND16
16:10NDND16
16:20NDND15
16:30NDND14
16:40NDND13
16:50NDND9.2
17:00NDND10
17:10NDND11
17:20NDND14
17:30NDND15
17:40NDND18
17:50NDND21
18:00NDND20
18:10NDND20
18:20NDND22
18:30NDND22
18:40NDND19
18:50NDND19
19:00NDND18
19:10NDND18
19:20NDND16
19:30NDND16
19:40NDND16
19:50NDND17
20:00NDND19
20:10NDND18
20:20NDND20
20:30NDND21
20:40NDND21
20:50NDND23
21:00NDND19
21:10NDND18
21:20NDND17
21:30NDND18
21:40NDND16
21:50NDND14
22:00NDND14
22:10NDND15
22:20NDND11
22:30NDND9.0
22:40NDND10
22:50NDND10
23:00NDND11
23:10NDND10
23:20NDND14
23:30NDND16
23:40NDND16
23:50NDND15